Affiliation: | 1. Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy, Fax: (+39)?081?678139;2. Clemens Sch?pf‐Institute of Chemistry and Biochemistry, Darmstadt University of Technology, Petersenstr. 22, 64287 Darmstadt, Germany |